(MENAFN - PRLog) 1. Compression molding is also called molding in the industry. The molding of thermosetting plastics such as phenolic resin and unsaturated polyester resin is the first step in the processing of plastic bottles. GUANGZHOU, China - March 14, 2019 - PRLog -- 1. Compression molding is also called molding in the industry. The molding of thermosetting plastics such as phenolic resin and unsaturated polyester resin is the first step in the processing of plastic bottles. 2. Extrusion extrusion, also known as extrusion molding, is a method in which an extruded resin is continuously passed through a die by an extruder to extrude a product of a desired shape. The utility model has the advantages that the product of various shapes can be extruded, the production efficiency is high, and the production can be automated and continuous; the disadvantage is that the thermosetting plastic cannot be widely processed by the method, and the product size is prone to deviation. 3. Injection molding can also be called injection molding. Injection molding is a method in which a thermoplastic melt is injected into a mold under high pressure using an injection molding machine to obtain a product by cooling and solidifying. The advantages of injection molding are fast production speed, high efficiency, automatic operation, and the ability to form parts with complex shapes, which are especially suitable for mass production. The disadvantage is that the cost of equipment and mold is high, and the injection molding machine is not easy to clean. 4, blow molding is also called hollow blow molding. Mainly by means of the pressure of compressed air, a method of inflating a hot resin parison closed in a mold into a hollow article, which comprises two methods, a blown film and a blown hollow article. The blow molding method is mainly used for producing film products, various bottles, barrels, pots, and the like.
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